30 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHClanking noise..need help
Reported or suspected cause
intermediate shaft bearing failure
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
turned out to be an intermediate shaft bearing failure.
Leading evidence: 'intermediate shaft bearing failure' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'intermediate shaft bearing failure' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check oil filter and coolant tank...surprise' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
Ended up being an intermediate shaft failure and the motor was replaced with a Porsche remanufactured engine that came with a 2 year warranty and everything new bolted on except for an AC compressor.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
Alright now this is strange, after speaking with the mechanic who ran me through a stretch of senerios which had me nervous.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
Ended up being an intermediate shaft failure and the motor was replaced with a Porsche remanufactured engine that came with a 2 year warranty and everything new bolted on except for an AC compressor.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
30 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T181445Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Went to turn on the car this moring when upon its start up the engine started making a raddling noise with some vibration. It sounded like an old catalytic gone bad. Funny thing the car has 25k and is never really driven hard at all.
Do you think there is any chance of this being a minor issue? also dose anyone know of any good Porsche mechanics in Miami?
Thanks in advance
I had a terrible noise last week. See this thread.
https://rennlist.com/forums/996-forum/402656-what-happened-to-my-porsche.html
Some one else described the noise of the intermendiate shaft failure as being like a bunch of metal parts in a clothes dryer. That's what mine sounded like. I hope your problem is less severe. Do look under the car for oil, thought.
i had this same clacking on my old '98 boxster. turned out to be an intermediate shaft bearing failure. i was "good willed" a new engine. good luck and i hope it's nothing serious.
Alright now this is strange, after speaking with the mechanic who ran me through a stretch of senerios which had me nervous. We arrange to have the car towed to the shop next week. Here is were it gets strange, In my curiosity I decide to start the motor (I know this is not the most intelligent thing to do given the situation). So I muster up the courage and start it. Instantly the check engine light turns off and the motor sounds normal. I go and run it around with no other symptoms.
I simply do not understand. Need less to say I am still planning on taking the car in to have the computer read.
Any ideas why this would happen??
I'll elaborate on my experience above. I had been idling at the dealer's carwash waiting my turn. The engine started making the terrible noise and then stalled. I restarted and the noise resumed. Shut it off and did a visual, finding nothing. I then drove about a half mile to the service department. During the drive the noise stopped. Arriving in the service bay the engine seemed to be just purring along. We all continued inspection with flashlights, again finding nothing. The noise never resumed They shut the engine off to be able to close the outside door. I believe that it was after the engine was shut down for the last time, the oil began to flow. The point is; if you have the same problem it might not be finished the failing process.
I hope you get the best answer from the shop. It might turn out to be something trivial.
I'll elaborate on my experience above. I had been idling at the dealer's carwash waiting my turn. The engine started making the terrible noise and then stalled. I restarted and the noise resumed. Shut it off and did a visual, finding nothing. I then drove about a half mile to the service department. During the drive the noise stopped. Arriving in the service bay the engine seemed to be just purring along. We all continued inspection with flashlights, again finding nothing. The noise never resumed They shut the engine off to be able to close the outside door. I believe that it was after the engine was shut down for the last time, the oil began to flow. The point is; if you have the same problem it might not be finished the failing process.
I hope you get the best answer from the shop. It might turn out to be something trivial.
This is the thread I started on this episode.
http://forums.rennlist.com/rennforum...d.php?t=402656
The engine is out of the car and when I left they had not yet split the case. The intermendiate shaft bearing failed. There was some loose material in the cam chaincase. If there is no further damage internally, they will rebuild the engine. I will report as this episode progresses.
The dealer is going to do the job. I know most here would prefer a factory rebuild believing it to be better. Maybe, on the other hand mine only has 15,000 miles on it, a reman core could have a lot more.
I have almost two and a half years CPO after the warranty expires in June. I will do an engine oil analysis on the couple of oil changes. I wish it had never happened but there it is.
Sorry, I have been out on business. I have not had chance to drop the car off at the mechanic yet. I have driven it twice around the block and to run an arron. Car seems like nothing ever happened. I am a little nervous after reading some of these threads. I will advise as soon as I ger the computer readout.
if you are lucky, maybe the catalytic converter packing came loose. Now it's wedged in again and no noise. Cats are emissions and have longer federal warranty coverage.
So what year is this car? If it is a CAT baffle that is loose it is not warranty unless it makes the CEL go on!! Noise from the CAT is not under the warranty, only emission issues.
I had similar issues on my 99 996 at 73k miles. Terrible noise on the freeway that would sometimes go quiet... took it home, and no leaks or other visual stuff showing. Restarted the car and it was much quieter... ended up driving it to my brothers dealership and the noise was almost gone as I pulled up. Very strange...
There was never a CEL light or leak on this motor. But, I had them check the oil filter and coolant tank...SURPRISE! Oil filter was filled with metal particles. Ended up being an intermediate shaft failure and the motor was replaced with a Porsche remanufactured engine that came with a 2 year warranty and everything new bolted on except for an AC compressor. Somewhat happy ending I guess.
David
That's the 996 Dictionary's definition of happy?
Happy
[adj.] The feeling a 996 owner gets when he replaces his blown motor with a remanufactured motor that
almost
bolts up to everything.
Too funny...
My 40th Anniversary would do this occasionally, but only on hot days and only about once every 100 starts (rough estimate). The tach would read very low revs. I would immediately turn the engine off and then restart it, and it would run fine. One time I decided to let it continue to see what would happen; it took about 3-4 seconds before the engine smoothed out, revs went to idle speed. I figured it was some strange ECU inability to instruct the engine properly, but I always wondered about it and mentioned it to the dealer when I took it in for service.
At 30k miles (about a month ago), my intermediate shaft failed while the car was idling after a 20 mile drive at freeway speeds and some very mild stop and go driving after exiting the expressway. At the dealer, I again mentioned the strange behavior the car had displayed over the years. The service manager noted it, I suppose for Porsche's database. Anyway, I've always wondered about that rough starting.
Good luck. Hope it works out for you.
